• grounding electrode conductor connection to concrete encased electrode

    NEC 2014 Section 250.52(A)(3) states that 1/2 inch or larger rebar bonded by tie wire (20 ft or more) can be used as the grounding electrode. When attaching the grounding electrode conductor to the rebar to be encased...
    apurvadave
    last modified by apurvadave
  • Building and Life Safety: Requirements for Emergency Egress Drills

      It's back to school time. But, what back to school will look like in 2020 will be unlike anything in the past.  Currently, communities are facing unprecedented challenges from the COVID-19 pandemic causin...
    kristinbigda
    last modified by kristinbigda
  • Storage of LP cylinders with a facility

    I have an external gas line within a hospital facility and the service will be cut off to accommodate ongoing construction.  The gas line feeds a vital service within the hospital so I'm trying to devise a way to...
  • To calculate the storage tank volume ...

    Hello To calculate the storage tank volume , Should water for the number of active sprinklers be collected with water for active fireboxes?  for 5-storey apartment If yes :  According to which part of NFP...
    babak.ha1989
    last modified by babak.ha1989
  • What techniques or theories(formula) have been used to create life safety codes (NFPA101)?

    I really want to know for a new study. PLZ
    kys800174
    created by kys800174
  • FIRE HYDRANT

    TECHNICAL QUERY:  #FIRE HYDRANT For a project site where Fire Station is within travel distance of less than 60 seconds, do we need a private hydrant system OR can we avoid hydrant system as CIVIL DEFENSE FIRE ...
    guptarajatgupta
    created by guptarajatgupta
  • Foam chamber in geodesic dome tank roof

    Is it possible to install foam chamber in geodesic dome tank roof  (witn internal floating roof) instead of foam chamber in shell tank?? I have not found something about in NFPA 11. What criteria I should take i...
    mignot
    last modified by mignot
  • Fire Sprinkler System at ICE CREAM Factory

    Hi, I have been working for design of fire sprinkler system for ICE cream factory. It consist of (1) Installation at packing hall where the temperature of packing hall is 15degC. (2) Installation at Cold Stora...
    nfpaunilev
    last modified by nfpaunilev
  • Article 220-22

    Hi, i would like to know article 220-22 still available in NEC? as we can't find in our book.  Thanks
    cl_yeoh
    last modified by cl_yeoh
  • fire alarm and signaling code

    hi everyone,  I am new to the field and i need your advice. i couldn't find a rule of addressable fire system in NFPA 72, where does require to install "addressable fire system" and "conventional fire system...
    gk.karkashadze
    last modified by gk.karkashadze
  • Listed

    Dear All A question to members of this forum. NFPA describes "Listed" as Equipment included in a list published by an organization that is acceptable to the AHJ. OHSA (under United States department o...
    mch
    last modified by mch
  • NFPA 2001 ¿What would be my correction factor if my equivalent altitude is over 14,000 ft?

    In Chapter 5 in NFPA 2001, edition 2018  There is a table, Table 5.5.3.3 Atmospheric Correction Factors.   ¿What would be my correction factor if my equivalent altitude is over 14,000 ft? ...
    cperez_0
    last modified by cperez_0
  • Could someone tell me if this is safe?

    Hello all.   I have an easement on my property that runs from an electrical pole on the road, back, underground about 800 feet to a neighbors yard where it stops at a transformer. There is a creek the runs perpe...
    seve.anderson
    last modified by seve.anderson
  • FIRE HOSE REEL

    Hi  What is the standard size and length of Fire Hose Reel or Class II Hose Reel System? Where exactly is this mentioned in NFPA standard?   As per my knowledge Fire Hose Reel standard is 25mm dia and 30mtr ...
    josephjojoadoor
    last modified by josephjojoadoor
  • PRV and Fire Pumps

    We have a gravity fed water supply located on a mountain that supplies the city's water system. This supply is being recommended as the water supply for a project at a lower elevation. The water supply is being booste...
    gordon
    last modified by gordon
  • Evacuation Drills in Schools

    With regard to emergency evacuation drills in schools, has anyone come up with modifications (or have suggestions) due to COVID as we approach the new school year?  Physical distancing will be the challenge as al...
    ggroothuizen
    last modified by ggroothuizen
  • Maintaining a financial safety net: insuring wildfire in California

    The ripple effects of the record-breaking property losses in California due to wildfires in 2017 and 2018 are still being felt as survivors work to rebuild their homes, local governments scramble to help recover neede...
    michelesteinberg
    last modified by michelesteinberg
  • Initial attack force

    I would like to know if, in a NFPA standard, a formula exist about calculing the initial attack force, for exemple for an industral plant. We know fro residential fire, 10 FF is recommanded, but is there a way to calc...
    francoishalle
    last modified by francoishalle
  • EPS load test.

    I have a question about running the monthly load test for an EPS. I work for a hospital and I am running the load tests for our 800 KW generators. According to the compliance guy, the load must be over 30% of the na...
    shagunaa
    last modified by shagunaa
  • NFPA Standards Council Agenda and Hearings Schedule for the August 2020 Meeting Now Available

    The NFPA Standards Council will be meeting on August 10-13, 2020 by video conference (daily sessions from 10 a.m. – 2:00 p.m. EST until conclusion of meeting).  At this meeting, some of the topics the Coun...
    debbiebaio
    last modified by debbiebaio